update error

[derkarol]

[Vue warn]: Duplicate keys detected: '1'. This may cause an update error.

found in

---> <SF03>...and path of templates here

[derkarol]

Just to clarify a bit. It is ok when launching your example vue-world from link in your git-description. I got this error running it locally. From demo:dev.

[fritx]

@derkarol it was because a PR to vue (vuejs/vue#7200) and merged before 2.5.10.
We should avoid duplicated v-keys in the same template level, which we didn't have to.

[fritx]

Thanks for reporting! @derkarol